Builders Choice 1/2 in. x 4 ft. x 8 ft. R-3 Natural Soundboard Insulating Sheathing

Natural Soundboard Insulating Sheathing is a rigid panel produced from non-toxic organic material and natural wood fibers that are wax impregnated. The wax impregnation resists water penetration into the board. The density and rigidity of the board provide excellent noise control properties.